Injection engine



F. LANG INJECTION ENGINE Original Filed Dec. 1, 1930 April 23, 1935.

Patented Apr. 23, 1935 UNITED STATES PATENT OFFICE INJECTION ENGINEFranz Lang, Munich, Germany, assignor to Lanova Aktiengesellschaft,Vaduz, Liechtenstein My invention relates to a fuel injection internalcombustion engine of the type which embodies an air chamber in whichfluid is compressed during the compression stroke of the piston and lfrom which the fluidissues during the working stroke of the piston.

This application is a division of my copending application Serial No.499,223, filed December 1, 1930, for Fuel injection internal combustionengines.

The instant invention contemplates an improved combustion chamber shapeand fuel nozzle air chamber and valve relationship, to the end ofobtaining effective mixing of the charge, keeping crude oil from comingbetween the piston and cylinder walls, and accomplishing simplicity ofconstruction.

My invention is illustrated in the accompanying drawing, in which Figure1 is a vertical axial sectional view of those portions of the enginewith which my invention is concerned;

Figure 2 is a vertical axial sectional view taken at right angles to theplane of Figure 1; and

Figure 3 is a horizontal sectional view taken on the plane of the lineEF of Figures 1 and 2, looking downwardly, the lines AB and C-Dindicating the planes on which Figures 1 and 2, respectively, are taken.

The drawing shows the cylinder, the piston which reciprocates in thecylinder, and the head. The fuel nozzle is shown at a, the air chamberat b, the combustion chamber at c, and the inlet and outlet valves at dand 6, respectively.

The combustion chamber 0 formed in the head, is of circular section, inone vertical plane, and the nozzle and air chamber are disposed onopposite sides of the combustion chamber in this vertical plane. The airchamber opening is flared toward the combustion chamber and the wall ofthis flared opening merges with the circular wall of the combustionchamber in such a way that a pear-shape results in said vertical planeas shown in Figure 2. At right angles to the above mentioned verticalplane, the combustion chamber is rectangular in cross section, as shownin Figure l, and the inlet and outlet passages communicate with thecombustion chamber by way of openings in the fiat vertical side walls 1Claim. (01. 123-32) as is clear from Figures 1 and 3. The inlet andoutlet elements lie horizontally and are of elbow formation, as shown inFigure 3, and the stems of the inlet and outlet valves d and 6,respectively, are appropriately mounted in bosses formed with theelbows.

As clearly shown in the drawing, the combustion chamber 0 communicatesdownwardly with the cylinder over the central portion of the piston, theremainder of the area of the piston top coming fairly close to the head,as shown.

Upon the compression stroke of the piston, fluid from above the pistonis compressed in the chamber b, and upon the working stroke of thepiston this fluid issues from the chamber at high velocity, the streamof fluid being directed toward the opposite combustion chamber wall fromwhich the fuel injection comes, and the charge is then whirled centrallyinto the cylinder, as indicated in Figure 2.

Suitable mechanism is of course provided to cause the valves to operateat the proper time in the cycle, and suitable mechanism is of courseprovided to cause the nozzle 0. to inject fuel into the combustionchamber at the proper time in the cycle, beginning with the finalcompression.

I claim:-

In an injection engine, a cylinder and a piston operating therein, acombustion chamber of rectangular shape in vertical cross-section and ofapproximately pear shape in vertical lengthwise section overlying andcommunicating with the cylinder centrally thereof through a restrictedslot-like opening of rectangular shape in plan, the side walls of saidchamber being flat and vertical, inlet and exhaust valves mountedcoaxially in said side walls on an axis normal to the cylinder axis, anair storage chamber opening into the combustion chamber at the tip endof the latter through a restricted orifice, and a fuel injection nozzleopening into the combustion chamber at the opposite end of the latter.said nozzle being disposed coaxially with said orifice on an axis normalto the cylinder axis, the common axis of said valves and the common axisof said nozzle and said'orifice being disposed in a common planesubstantially normal to the cylinder axis.

FRANZ LANG.

